作者:Anna E. Panarina、Alla V. Dogadina、Valentin I. Zakharov、Boris I. Ionin
DOI:10.1016/s0040-4039(01)00711-0
日期:2001.6
Addition of secondary amines to alkynylphosphonates catalyzed by Cu(I) salts proceeds regio- and stereospecifically to form (E)-2-(dialkylamino)alkenylphosphonates. The E-configuration was proved by analysis of 13C–31P vicinal spin–spin coupling constants in the NMR spectra of the products and authentic model compounds. The 3JPC constants in the model compounds fall in the range of 6–12 Hz for the
在Cu(I)盐催化下,将仲胺加成到炔基膦酸酯上,区域和立体有针对性地形成(E)-2-(二烷基氨基)烯基膦酸酯。所述ë -构型通过的分析证明13 C- 31 P连位自旋-自旋的产品和真实模型化合物的NMR谱偶合常数。对于耦合核的顺式排列,模型化合物中的3 J PC常数在6-12 Hz的范围内,对于反式构型,其3 J PC常数等于或高于16 Hz 。加成产物中的相关耦合常数约为5 Hz,即对应于顺式 耦合。